/Engine/Source/Editor/ContentBrowserData/Public/ContentBrowserDataSource.h
CompileFilter.
virtual bool DoesItemPassFilter ( const [FContentBrowserItemData](API\Editor\ContentBrowserData\FContentBrowserItemData) & InItem, const [FContentBrowserDataCompiledFilter](API\Editor\ContentBrowserData\FContentBrowserDataCompiledFilte-) & InFilter )